package test.day03;

public class MergeTwoOrderdLink {
	class ListNode {
		int val;
		ListNode next;

		public ListNode(int x) {
			val = x;
			next = null;
		}
	}

	public ListNode mergeTwoLists(ListNode l1, ListNode l2) {
		ListNode dummyHead = new ListNode(0);
		ListNode curr = dummyHead;
		while (l1 != null && l2 != null) {
			if (l1.val < l2.val) {
				curr.next = l1;
				l1 = l1.next;
				curr = curr.next;
			} else {
				curr.next = l2;
				l2 = l2.next;
				curr = curr.next;
			}
		}
		if (l1 == null) {
			curr.next = l2;
		}
		if (l2 == null) {
			curr.next = l1;
		}
		return dummyHead.next;
	}
}
